One woman's exit from the U.S. Open was jarring and sudden. Another's came off as sad and not all that surprising. Victoria Azarenka and Melanie Oudin said goodbye to Flushing Meadows in starkly different manners Wednesday - Azarenka, a concussion victim collapsing on the overheated court and Oudin a straight-set loser to a player who cared little about the 18-year-old's dreams of a fairy tale repeat.